| 摘要 |
<p>The castor is provided with a wide pivot hole and with the axle set eccentrically. A spring about the axis coupled two sets of brake pads together so that when the castor is unladen the brake pads brake between the axle and the castor, while in the laden state the eccentricity is depressed and the castor rolls with reduced resistance. The brake is compact and operates progressively as the loading is increased When unladen the eccentric mounting of the castor provides a repetitive braking.</p> |
